关于three.js:threejs初识-大帅老猿threejs特训

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threejs 初识 | 大帅老猿 threejs 特训

筹备工作

要装置 three 的 npm 模块，请在你的我的项目文件夹里关上终端窗口，并运行：
```
npm install three
```

引入头文件

import * as THREE from 'three';
// 相机轨道控制器
import {OrbitControls} from "three/examples/jsm/controls/OrbitControls";
//gltf 资源加载器
import {GLTFLoader} from "three/examples/jsm/loaders/GLTFLoader";
// 纹理贴图加载器
import {RGBELoader} from 'three/examples/jsm/loaders/RGBELoader';

利用

创立场景

const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.01, 10);
camera.position.set(0.3, 0.3, 0.5);
// 渲染器
const renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

const controls = new OrbitControls(camera, renderer.domElement);

// 增加灯光
const directionLight = new THREE.DirectionalLight(0xffffff, 0.4);
scene.add(directionLight);

加载资源

let donuts;
new GLTFLoader().load('../resources/models/donuts.glb', (gltf) => {scene.add(gltf.scene);
    donuts = gltf.scene;

    mixer = new THREE.AnimationMixer(gltf.scene);
    const clips = gltf.animations; // 播放所有动画
    clips.forEach(function (clip) {const action = mixer.clipAction(clip);
        action.loop = THREE.LoopOnce;
        // 停在最初一帧
        action.clampWhenFinished = true;
        action.play();});

})

加载场景贴图

new RGBELoader()
    .load('../resources/sky.hdr', function (texture) {
        scene.background = texture;
        texture.mapping = THREE.EquirectangularReflectionMapping;
        scene.environment = texture;
        renderer.outputEncoding = THREE.sRGBEncoding;
        renderer.render(scene, camera);
});

动画办法实现

function animate() {requestAnimationFrame(animate);
    renderer.render(scene, camera);
    controls.update();

    if (donuts){donuts.rotation.y += 0.01;}
    if (mixer) {mixer.update(0.02);
    }
}

animate();